Patent
Rolling mill control method and apparatus
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TLDR
In this paper, a rolling mill with computer programmed for absolute lock-on AGC control rolls material having absolute aim gage without using an active thickness gage in the control loop is presented.Abstract:
Rolling mill with computer programmed for absolute lock-on AGC control rolls material having absolute aim gage without using an active thickness gage in the control loop. Computer is programmed to calculate; (a) lock-on length of rolled material, (b) mill stretch using a simplified subroutine, (c) calibration-corrected roll gap, (d) a lock-on thickness error relative to aim gage, (e) a corrected roll gap reference signal as a function of a constant lock-on thickness error and other variable thickness errors caused by changes in mill stretch and roll gap occurring after lock-on, and (f) a rate-sensitive variable gain of the corrected roll gap reference signal to reduce thickness errors to substantially zero as rapidly as possible.read more
Citations
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Apparatus for controlling re-distribution of load on continuous rolling mill
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References
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Patent
Rolling mill control
James R. Adair,Ronald W. Deems +1 more
TL;DR: In this article, a control for a rolling mill in which a signal representing the required stretch of the mill for a desired thickness of product and roll gap setting, which stretch is first employed to set the initial roll gap predicated on a predicted rolling pressure, is compared with a signal showing the actual stretch during rolling, is presented.
Patent
Gauge control method and apparatus including workpiece gauge deviation correction for metal rolling mills
Andrew W Smith,Richard Q. Fox +1 more
TL;DR: In this article, an automatic roll force gauge control system for a tandem hot steel strip rolling mill is presented. Butts and Hinton present a control system that calculates screwdown movement required for correction of determined gauge error on the basis of measured roll force and screwdown position values.
Patent
Method and apparatus for cold rolling mill gauge deviation correction
TL;DR: In this article, a series of change signals are produced after each series of screwdown regulation cycles where each change signal is produced as a function of the ratio of the gauge deviation remaining after the regulation cycle, to the change in rolling force which occurred during a regulation cycle.